JP2000087374A - Inclination adjusting device for manhole cover plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of freely adjusting the inclination direction and the angle of inclination of a cover plate even when a spacer is not replaced in the device for adjusting the inclination direction and the angle of inclination of a manhole cover plate. SOLUTION: Two rings having wedge-like side shape or spacers substantially equivalent thereto are movably overlapped to be interposed between the outer frame and the inner frame of a manhole device provided with the inner frame 2 vertically movably and inclinably fitted to the inside of the outer frame 1. The equivalent spacer can be formed of one ring-like spacer and a circular spacer 21 overlapped at a position equally dividing the circumference. When the inner frame in rotatable, the upper side disposed ring-like spacer can be integrated with the lower face of the inner frame. The overlapped spacers are relatively rotated to adjust an angle of inclination, and the whole body is rotated to adjust an inclination direction. A maximum thickness position and a mark indicating an angle therefrom are provided on the ring-like spacer and the inner peripheral face of the inner frame integrated therewith to easily perform the adjustment of the direction of inclination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device which is installed in a manhole device and is used for adjusting a tilt direction and a tilt angle of a manhole cover plate.

[0002]

2. Description of the Related Art A manhole device is fixed on an upper surface of a concrete manhole block buried underground, and the manhole block communicates with a horizontal hole provided in the ground for sewerage and cable wiring. ing. The cover plate of the manhole device is exposed on the ground surface, and the cover plate surface is desirably flush with the surrounding ground surface so as not to hinder the safe passage of pedestrians and vehicles. When installing the manhole device for the first time, it is possible to adjust the height and angle of the manhole device by means such as attaching the manhole device after adjusting the height by painting mortar on the upper surface of the manhole block. is there.

However, after the manhole device is installed, when the surrounding ground surface is repaired or the pavement is repaired to repair the pavement surface, the repaired ground surface does not match the surface of the manhole cover plate. This happens often.
Focusing on this point, the inventor of the present application has a manhole device with a short cylindrical outer frame fixed to the upper surface of the manhole block, and a play gap so that the manhole device can be vertically moved and tilted inside the outer frame. A short cylindrical inner frame fitted and fitted, and a lid plate fitted to the upper end of the inner frame, and the height and inclination of the inner frame in the outer frame are adjusted by a lifting / lowering tool utilizing a screw action. An adjustable manhole device is provided (JP-A-8-27882).
No. 5, 177106, etc.).

In the manhole device having the above structure, the weight of the vehicle acting on the cover plate is transmitted to the outer frame via the inner frame. In order to withstand this large weight, a spacer is interposed between an inner flange provided on the inner peripheral side of the outer frame and the inner frame so that the load applied to the cover plate is transmitted to the outer frame. As this spacer, a short arc-shaped spacer forming a part of a ring-shaped spacer is used. The arc-shaped spacers include those having a constant thickness and those having a thickness gradient in the circumferential direction. The height and the inclination of the cover plate are adjusted by stacking a plurality of the spacers as necessary.

When the work of matching the surface of the cover plate with the surrounding ground surface is performed, it is necessary to replace or add a spacer. The arc-shaped spacer partially supports the inner frame at a plurality of positions, but the spacer can be replaced or added from the inside of the manhole without removing the inner frame.

[0006]

The ring-shaped spacer is advantageous in strength because it supports the entire lower surface of the inner frame, but it cannot be replaced or added unless the inner frame is removed. Further, as a problem of the conventional spacer, there is a problem that various types of spacers having different gradients in the thickness direction must be prepared in order to cope with various inclinations of the ground surface in various directions and angles.

Therefore, according to the present invention, the inclination direction and the inclination angle of the cover plate can be freely adjusted without replacing the spacer within a range designed in advance. It is an object of the present invention to provide a manhole cover plate tilt adjusting device capable of adjusting the tilt direction and the tilt angle of the cover plate in smaller angle units.

[0008]

According to the present invention, two rings having a wedge-like side shape or a spacer substantially equivalent thereto are rotatable about an axis thereof between an outer frame and an inner frame. The above problem is solved by interposing.

A manhole cover plate inclination adjusting device according to a first aspect of the present invention includes an outer frame 1, an inner frame 2 fitted inside the outer frame so as to be vertically movable and tiltable, and an upper end of the inner frame 2. A lid plate of a manhole device provided with a lid plate 5 fitted into the outer frame, wherein the upper surface of the inner flange 4 formed on the outer frame and the lower surface of the inner frame are overlapped. And two ring-shaped spacers 11, 11 interposed so as to be relatively rotatable about the axis thereof, and the upper surface and the lower surface of each ring-shaped spacer are planes intersecting at a predetermined angle. .

According to a second aspect of the present invention, the inclination adjusting device for a manhole cover plate is rotatably mounted around a central axis between an upper surface of the inner flange 4 formed on the outer frame and a lower surface of the inner frame. A ring-shaped spacer 11 and an arc-shaped spacer 21 superposed so as to be movable and positioned at a predetermined pitch at positions equally dividing the circumference of the ring-shaped spacer are provided. Is a plane intersecting at a predetermined angle, and a plurality of arc-shaped spacers each having a shape obtained by cutting out the above-mentioned equally divided portion of the ring-shaped spacer whose upper surface and lower surface intersect at a predetermined angle. A pair of members, on the opposing surfaces of the ring-shaped spacer and the arc-shaped spacer, provided with a fitting pair consisting of fitting elements with irregularities that define the circumferential and radial positions of the arc-shaped spacer, Mating parts of the pacer is characterized in that it is arranged at the predetermined pitch on the circumference.

The third and fourth aspects of the present invention are such that the ring-shaped spacer 11 of the first and second aspects is integrated with the inner frame. In other words, in the inclination adjusting device for a manhole cover plate according to the third aspect, the downward surface of the inner frame 2a is an inclined surface inclined at a predetermined angle with respect to the upper end surface, and the inner flange 4 formed on the downward surface of the inner frame and the outer frame. A ring-shaped spacer 11 having a flat surface whose upper surface and lower surface intersect at a predetermined angle is interposed between the upward surface and the upper surface so as to be rotatable around its axis.

According to a fourth aspect of the present invention, there is provided an inclination adjusting device for a manhole cover plate, wherein the circumference of the inner surface is equal between the downward surface of the inner frame having the lower surface inclined and the upward surface of the inner flange 4 formed on the outer frame. An arc-shaped spacer 21 is interposed so as to be movable and positioned at a predetermined pitch at a position to be divided. Arc-shaped spacer
A plurality of spacers each having a shape obtained by cutting out the above-mentioned equally divided portion of the ring, which is a plane where the upper surface and the lower surface intersect at a predetermined angle, and a downward facing surface or an outer frame of the inner frame 2a. On the facing surface of the upward facing surface of the inner flange and the arc-shaped spacer, provided with a fitting pair consisting of concave and convex fitting elements that define the circumferential and radial positions of the arc-shaped spacer,
The fitting elements on the lower surface of the inner frame or the upper surface of the inner flange of the outer frame are arranged at a predetermined pitch on the circumference.

According to a fifth aspect of the present invention, in the tilt adjusting device provided with a ring-shaped spacer, the ring-shaped spacer has a projection or a concave portion serving as a grip portion or an insertion portion when rotating the ring on the inner peripheral portion of the ring. Characterized by having a location. According to a sixth aspect of the present invention, there is provided a tilt adjusting device having an independent or integral ring-shaped spacer.
A mark indicating the maximum thickness position and an angle from the maximum thickness position is provided on the inner peripheral surface of the ring-shaped spacer 11 and / or the inner frame 2a.

[0014]

When two ring-shaped spacers having an upper surface and a lower surface intersecting each other at a predetermined angle are superimposed and one of them is rotated about the center axis with respect to the other, the upper ring with respect to the lower surface of the lower ring The angle of inclination of the upper surface of the device changes continuously.
The maximum inclination angle is when the maximum thickness portion of both rings is matched, and the minimum inclination angle is when the maximum thickness position and the minimum thickness position of both rings are matched. is there.
The angles at which the upper and lower surfaces of both rings intersect may not be the same, but if they are the same, the lower surface of the lower ring and the upper surface of the upper ring can be made parallel.

If the two superimposed rings are integrally rotated about the central axis without changing their relative phases, the direction of the inclination can be changed.

The above-described action is also achieved when the two-layered ring having the above structure is formed into a plurality of (three or more) arc-shaped members obtained by cutting one of the rings at an appropriate position in the circumferential direction. . When one ring-shaped spacer is used as a plurality of arc-shaped spacers equivalent to this,
In order to uniformly support the load acting on the manhole,
It is necessary to dispose the arc-shaped spacer at a position that equally divides the circumference, and to provide a positioning pair that regulates the circumferential position of the plurality of arc-shaped spacers so that the relative positional relationship between the arc-shaped spacers is maintained. In addition, since the arc-shaped spacer may fall into the inside of the manhole, the position in the radial direction should be restricted. These restrictions can be easily achieved by providing a pair of projections and depressions between the ring-shaped spacer and the arc-shaped spacer.

When one of the overlapped spacers is a plurality of arc-shaped spacers, the relative rotation about the central axis of the ring-shaped spacer and the arc-shaped spacer is continuously performed due to the provision of the fitting pair. It is difficult to get them.
Therefore, the angle must be adjusted step by step, but by appropriately selecting the spacing between the engaging elements provided on the ring-shaped spacer, the inclination direction and the inclination angle of the lid plate are adjusted at a sufficient angular interval for practical use. it can. This is because a slight angle error between the surface of the manhole cover plate and the surrounding ground surface has no problem from a visual point or a running or walking point.

The protruding pieces and recesses provided on the inner peripheral side of the ring-shaped spacer are used for rotating the ring. The protruding pieces and the recesses can be provided at two or more places on the circumference, and are preferably provided at intervals different from the arrangement intervals of the fastening bolts connecting the outer frame and the inner frame.

Since the thickness gradient of the ring-shaped spacer is small, the maximum thickness position cannot be accurately found at first glance. By providing the mark indicating the maximum thickness position and the angle from the position, the inclination adjustment operation can be performed more easily and accurately.

The height of the cover plate is adjusted by overlapping an arc-shaped spacer having the same thickness in addition to the spacer having the above structure. If there is no problem in removing the inner frame when adjusting the height, a ring-shaped spacer having a uniform thickness can be used.

In the above description, two ring-shaped spacers or a combination of a ring-shaped spacer and an arc-shaped spacer are used. The ring-shaped spacer disposed on the upper side is integrated with the lower surface of the inner frame. By relatively rotating the inner frame and the lower ring-shaped spacer or the arc-shaped spacer about the central axis, the tilt direction and the tilt angle of the upper surface of the lid plate can be adjusted in exactly the same manner as described above. In the case of this structure, when the rotation of the ring-shaped spacer integrated with the inner frame is required, there is a disadvantage that the bolts that fasten the inner frame and the outer frame must be removed, but the overall height of the spacer is And the number of parts can be reduced.

[0022]

FIG. 1 is a sectional view showing the overall structure of a manhole device according to the present invention. The outer frame 1 is fixed to the upper surface of a concrete manhole block embedded in the ground, and has an outer flange 3 extending outward and an inner flange 4 extending inward at a lower end of the outer frame 1. A manhole cover plate 5 is fitted to the upper end of the inner frame 2, and the lower surface thereof faces the upward surface of the inner flange 4 of the outer frame 1. A spacer is inserted between the upper surface of the inner flange 4 of the outer frame 1 and the lower surface of the inner frame 2, and the height, the tilt angle, and the tilt direction of the cover plate 5 are set by the spacer.

The inner frame 2 has four bolts 8 inserted through four fastening flanges 6 provided on the inner peripheral portion thereof, and eight fastening flanges provided on the inner peripheral portion of the inner flange of the outer frame 1. 7 are fastened and fixed to the outer frame 1 with four nuts 9 inserted in half of the number.

In the first aspect of the present invention, the spacer is constituted by two ring-shaped spacers 11 which are superposed. As shown in FIGS. 2 and 3, the ring-shaped spacer 11 has a plane 13 including the upper surface 12 and a plane 15 including the lower surface 14 intersect at a predetermined angle (inclusion angle). It has. The crossing angle is 1
About twice. On the inner peripheral surface of the ring-shaped spacer 11,
There are provided three projections 16 for catching the tip of the burl when rotating the ring. Since the ring-shaped spacer 11 is arranged on the outer peripheral side of the bolt 8 for lifting and lowering and fastening the inner frame 2 with respect to the outer frame 1 and the bolts 8 are arranged at four circumferential positions, the protrusions 16 are formed at three places. By doing so, it is possible to perform the rotation operation of the ring using two places not blocked by the bolt. By providing one portion of the projection to be wide and provided at the maximum thickness position of the ring, it can be used as a mark indicating the maximum thickness position. A scale line 18 is provided on the inner periphery of the ring, for example, every 30 degrees from the mark 16 indicating the maximum thickness position.

In the invention of claim 2 of the present application, the spacer is constituted by one ring-shaped spacer 11 and a set of a plurality of arc-shaped spacers 21 superposed thereon. As shown in FIG. 5 and FIG. 6, when a plurality of (four in the figures) spacers are arranged at equal intervals on the circumference, the arc-shaped spacer 21 has a flat surface 22 including the lower surface and a flat surface 2 including the upper surface.
The angle of inclination of the surface of each of the arc-shaped spacers is determined so that each of the third and third surfaces intersects at one angle E. Further, each of the spacers is provided with two recesses 24 which are elongated in the circumferential direction on the lower surface, and the ring-shaped spacer
For example, 12 projections 25 having a pitch of 30 degrees are provided on the upper surface of the ring-shaped spacer 11 so that the position of the arc-shaped spacer 21 on the ring-shaped spacer 11 does not move by fitting the recess 25 with the projection 25.

The two ring-shaped spacers 11 formed as described above are overlapped as shown in FIGS. 1 and 4, or a plurality of pairs are formed with the ring-shaped spacers 11 as shown in FIGS. 5 and 6. If a manhole device is installed by superposing the arc-shaped spacer 21 and interposing between the upper surface of the inner flange 4 of the outer frame and the lower surface of the inner frame 2, the angle of the cover plate of the manhole at the time of installation is provided. Can be adjusted according to the surrounding ground surface, and by repairing the ground surface after installation, it is possible to adjust the inclination direction and inclination angle of the manhole cover plate accordingly when the gradient changes Become. As described in the section of operation, the adjustment of the inclination direction is performed by rotating the overlapped spacers integrally, and the adjustment of the inclination angle is performed with respect to the ring-shaped spacer with respect to the other ring-shaped spacer or the arc-shaped spacer. Is relatively rotated.

If it is necessary to adjust the height of the manhole cover plate, the height of the manhole cover plate is further adjusted by stacking an arc-shaped spacer having a constant thickness on the spacer. Arc-shaped spacers with a constant thickness can be easily manufactured with the correct thickness.
In addition, the same shape can be used at any position on the circumference, and multiple layers of the same thickness can be stacked and adjusted to any height, which increases the cost of spacers and height adjustment work Is not a hassle.

FIG. 7 shows a section between the lower surface of the inner frame 2a having a lower surface inclined at an intersection angle E with respect to the upper end surface to which the cover plate 5 is fitted, and the upper surface of the inner flange 4 of the outer frame 1. And spacer 11
21 through 21 are examples. That is, the inner frame 2a of this embodiment is formed by turning the upper ring-shaped spacer 11 of the embodiment of FIG. 4 or the ring-shaped spacer 11 of the embodiment of FIG. It may be considered that the spacer is integrated with the lower surface of the inner frame 2 in these embodiments. Inner frame 2a and spacer 11 or 2
1 can be relatively rotated to adjust the inclination direction and the inclination angle of the upper surface of the lid plate 5 in the same manner as described above. For this adjustment, the inner frame 2a
Can rotate only in units of the arrangement interval of the fastening bolts, but the fastening flange 7 for mounting the nut 9 on the inner peripheral portion of the inner flange 4 is 2-3 times the number of the bolt fastening flanges 6 of the inner frame 2a. With such arrangement, the inclination direction can be adjusted with sufficient accuracy for practical use by selecting them. Inner frame 2 in this case
By providing a mark 16 indicating the maximum thickness position and a graduation line 18 indicating the angle from the mark on the inner periphery of a, the inclination angle and the inclination direction can be easily understood.

Another advantage of the embodiment of FIG. 7 is that the overall height of the manhole device can be reduced or the height of the manhole frame can be reduced because the thickness of one spacer can be included in the height of the inner frame. When the height is kept constant, the height adjustment range can be increased accordingly.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the overall structure of a manhole device according to the present invention.

FIG. 2 is a plan view of a ring-shaped spacer.

FIG. 3 is a sectional side view of a ring-shaped spacer.

FIG. 4 is a sectional side view of a manhole device provided with a ring-shaped spacer.

FIG. 5 is a plan view in which a ring-shaped spacer and an arc-shaped spacer are stacked.

FIG. 6 is a sectional side view of FIG. 5;

FIG. 7 is a sectional side view of the third and fourth embodiments.

[Explanation of symbols]

 1 outer frame 2 inner frame 4 inner flange 5 lid plate 11 ring-shaped spacer 21 arc-shaped spacer

Claims (7)

[Claims] 1. An outer frame (1), an inner frame (2) fitted inside the outer frame so as to be vertically movable and tiltable, and a lid plate (4) fitted to an upper end of the inner frame (2). 5) The inclination adjusting device for a cover plate of a manhole device comprising: an upper surface of an inner flange (4) formed on an outer frame and a lower surface of the inner frame in a state of being overlapped with each other and the axis thereof. A manhole, comprising two ring-shaped spacers (11, 11) interposed so as to be relatively rotatable around each other, wherein an upper surface and a lower surface of each ring-shaped spacer intersect at a predetermined angle; Tilt adjustment device for lid plate. 2. An outer frame (1), an inner frame (2) fitted to the inside of the outer frame so as to be vertically movable and tiltable, and a lid plate (4) fitted to an upper end of the inner frame (2). 5) a tilt adjustment device for a cover plate of a manhole device comprising: a rotatable around a central axis between an upper surface of an inner flange (4) formed on an outer frame and a lower surface of the inner frame. One ring-shaped spacer (11) attached to the
Arc-shaped spacer superimposed so as to be movable and positioned at a predetermined pitch at a position equally dividing the circumference of this ring-shaped spacer
(21), wherein the upper surface and the lower surface of the ring-shaped spacer are planes which intersect at a predetermined angle, and the arc-shaped spacer is a plane where the upper surface and the lower surface intersect at a predetermined angle. A plurality of members each having a shape obtained by cutting out a portion at a minute position, and defining a circumferential direction and a radial direction position of the arc-shaped spacer on the opposing surfaces of the ring-shaped spacer and the arc-shaped spacer. A tilt adjusting device for a manhole cover plate, comprising: a fitting pair comprising fitting elements having irregularities, wherein fitting elements of a ring-shaped spacer are arranged on the circumference at the predetermined pitch. 3. An outer frame (1), an inner frame (2a) fitted vertically and tiltably inside the outer frame, and a lid plate (4) fitted to an upper end of the inner frame (2a). 5) and a tilt adjustment device for a lid plate of a manhole device comprising: a downward surface of the inner frame (2a) is an inclined surface inclined at a predetermined angle with respect to an upper end surface to which the lid plate is fitted;
A ring spacer (11) is interposed between the downward surface of this inner frame and the upward surface of the inner flange (4) formed on the outer frame so as to be rotatable around its axis. An inclination adjusting device for a manhole cover plate, wherein the upper surface and the lower surface are planes intersecting at a predetermined angle. 4. An outer frame (1), an inner frame (2a) fitted vertically and tiltably inside the outer frame, and a lid plate (4) fitted to an upper end of the inner frame (2a). 5) and a tilt adjustment device for a lid plate of a manhole device comprising: a downward surface of the inner frame (2a) is an inclined surface inclined at a predetermined angle with respect to an upper end surface to which the lid plate is fitted;
An arc-shaped spacer (21) is interposed so as to be movable and positioned at a predetermined pitch at a position equally dividing the circumference between the downward surface of the inner frame and the upward surface of the inner flange (4) formed on the outer frame. The arc-shaped spacer is a set of a plurality of spacers each having a shape obtained by cutting out a portion of the ring, which is a plane in which the upper surface and the lower surface intersect at a predetermined angle, obtained by cutting out the above-mentioned equally divided portions, and the inner frame ( 2a) a fitting pair consisting of concave and convex fitting elements that define the circumferential and radial positions of the arc-shaped spacer on the facing surface of the downward-facing surface or the upward-facing surface of the inner flange of the outer frame and the arc-shaped spacer, The inclination adjusting device for a manhole cover plate, wherein the fitting elements on the lower surface of the inner frame or the upper surface of the inner flange of the outer frame are arranged at the predetermined pitch on the circumference. 5. The ring-shaped spacer is provided with a projection or a concave portion serving as a grip portion or an insertion portion when rotating the ring on an inner peripheral portion of the ring. Or the tilt adjusting device for a manhole cover plate according to 3. 6. The ring-shaped spacer (11) is provided on its inner peripheral surface with a mark indicating the maximum thickness position and an angle from the maximum thickness position. 3. The tilt adjusting device for a manhole cover plate according to 3. 7. A mark according to claim 3, wherein a mark indicating the maximum thickness position and an angle from the maximum thickness position is provided on the inner peripheral surface of the inner frame (2a). Manhole cover plate tilt adjustment device.